In terms of 'how', it's pretty straight forward. A Wolf3D EMS drives the 6 GM coils directly (no ignitor needed). Wire up one channel per coil. The L28ET sensor is wired directly to Wolf's trigger input, with one additional hole added, making the disc a 6+1 wheel. KTM covered this fairly well here... http://forums.hybridz.org/index.php/topic/59666-wolf-v500-ems-installation-guide/
Coil bracket, part numbers, and schematic here... http://forums.hybridz.org/index.php/topic/61802-l6-dis-brackets-lsx-coils-now-available/page__p__570261__hl__dis__fromsearch__1#entry570261
Many standalone EMS's will do this, including Motec, Haltech, Vi-Pec, etc.